Derek, 31, took to Instagram on Monday, Nov. 14 to give Bindi, 18, a sweet shoutout in honor of Australia's Steve IrwinDay.

"Since it's Nov. 15 in Australia, I wanted to wish everyone a wonderful Steve Irwin Day. I was always a fan of his passion and love for the world. His legacy lives on. It was such an honor and privilege to get to know and work with his beautiful daughter. Such a special soul," the pro dancer began.

Bindi and Derek on DWTS in November 2015.

"Choreographing and creating with her, helping to tell her story will always be a highlight in my career. This image was taken at the end of our final dance which was a tribute to her super hero, her dad, Steve Irwin," Derek captioned a candid pic of Bindi.

Kelly Monaco (Season 1 – June 2005)

Since twirling around the dance floor with partner Alec Mazo — who left the show after Season 5 — Kelly has hosted the Miss USA Pageant and starred on the E! reality series Dirty Soap. In 2012, she returned to DWTS for a chance to win a second Mirror Ball Trophy in Season 15 but finished in third.

Apolo Anton Ohno (Season 4 – March 2007)

The speedskating Olympian first danced with partner Julianne Hough in Season 4 and later partnered with Karina Smirnoff while appearing on the reality competition's "All-Star" Season 15. Since then, he has guest starred on popular TV shows including Hawaii Five-0, The Biggest Loser, and Minute to Win It.

Shawn Johnson (Season 8 – March 2009)

After she won the show's eighth season with Mark Ballas, Shawn returned to the reality competition for the "All-Star" Season 15 where she finished in second place. She has since authored a book and served as a spokeswoman for several popular brands.

Melissa Rycroft (Season 15 – September 2012)

Before winning DWTS with Tony Dovolani on the show's "All-Star" Season 15, Melissa was known for appearing on Season 13 of The Bachelor, for starring on the reality series Dallas Cowboys Cheerleaders: Making the Team, and finishing in third place on Dancing With the Stars' eighth season.

Alfonso Ribeiro (Season 19 – September 2014)

The former Fresh Prince of Bel Air star took home the Mirror Ball Trophy with pro partner Witney Carson. Since then, the actor and his wife, Angela Unkrich, welcomed their second son, Anders Reyn, in April 2015.

Rumer Willis (Season 20 – March 2015)

Bruce Willis and Demi Moore's eldest daughter won the Mirror Ball Trophy with pro Valentin Chmerkovskiy on the reality competition's 20th season! Since her big win, Rumer most recently starred as Roxie Hart in Chicago on Broadway.